PRESENT STATUS of Brevipalpus MITES AS PLANT VIRUS VECTORS

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PRESENT STATUS OF Brevipalpus MITES AS PLANT VIRUS VECTORS A.D. Tassi1, M.A. Nunes2, V.M. Novelli2, J. Freitas-Astúa3,4 & E.W. Kitajima1 1LFN, ESALQ, Universidade de São Paulo (USP), Piracicaba, SP, Brazil; 2Instituto Agronômico – Centro de Citricultura Sylvio Moreira, Cordeirópolis, SP, Brazil; 3Instituto Biológico, São Paulo, SP, Brazil; 4Embrapa Mandioca e Fruticultura, Cruz das Almas, BA, Brazil. First report of Brevipalpus (Acari: Trombidiformes: Tenuipalpidae) mites involved in virus transmission was made by Frezzi, in 1940, who found evidences of association of B. obovatus Donnadieu with citrus leprosis. Later, Musumeci & Rossetti in 1963 found that in Brazil this disease, caused by CiLV-C, is transmitted by B. phoenicis s.l. The same species was reported as the vector of CoRSV by Chagas in 1978, and PFGSV by Kitajima et al., in 1998. Maeda et al. in 1998 found that B. californicus (Banks) is the vector of OFV. Since then, several other cases of Brevipalpus transmitted viruses (BTV) have been described. However, introduction of new morphological and molecular criteria for the identification of some Brevipalpus species, particularly within the B. phoenicis group, resulted in significant changes in species determination. The situation became more complex when surveys revealed that Brevipalpus populations present in a given BTV-infected host plant may be composed by two or more species, making it difficult to determine the vector species. A reassessment of the previous description became necessary. In summary the present situation is: for the genus Cilevirus: B. obovatus, B. phoenicis s.l., B. yothersi Baker and B. papayensis Baker are reported as vectors; for the genus Higrevirus just association with Brevipalpus is known; and for the genus Dichorhavirus: B. californicus, B. yothersi, B. obovatus, B. phoenicis s.l., B. papayensis, B. phoenicis (Geijskes) and B. aff. yothersi were reported as vetors. More careful studies are necessary, using laboratory reared isolines of mites to determine the vector and parameters of vector-virus relationship. Keywords: Brevipalpus-transmitted viruses. Financial support: FAPESP (2014/08458-9). .

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